IRONMAN 70.3 Wisconsin - Half Distance Triathlon Swim: Kick off in Lake Monona with a one-loop, clockwise swim starting at Law Park Beach. Athletes self-seed in a "Rolling Start," navigating a buoy-marked course with an average water temperature of 75°F (24°C). Spectators enjoy great views along the shore. Bike: This challenging 56-mile loop through Madison’s hilly landscapes offers scenic beauty and a true test of endurance. Run: Finish strong with a rolling, out-and-back run through ...